Geographical Association Between Basic Life Support Courses and Bystander Cardiopulmonary Resuscitation and Survival from OHCA in Denmark

Theo Walther Jensen,1– 3 Annette Kjær Ersbøll,3,4 Fredrik Folke,2,3,5 Mikkel Porsborg Andersen,6 Stig Nikolaj Blomberg,1– 3 Mathias Geldermann Holgersen,2,7 Lars Bredevang Andersen,1 Freddy Lippert,2,3 Christian Torp-Pedersen,6,8 Helle Collatz Christensen1,2,9 1Emergency Medical Services Region Zealand, Naestved, Denmark; 2Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark; 3Copenhagen Emergency Medical Services, University of Copenhagen, Copenhagen, Denmark; 4National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark; 5Department of Cardiology, Herlev Gentofte University Hospital, Gentofte, Denmark; 6Department of Cardiology, Nordsjaellands Hospital, Hilleroed, Denmark; 7Paediatric Pulmonary Service, Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital, Copenhagen, Denmark; 8Aalborg University Hospital, Aalborg & Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark; 9Danish Clinical Quality Program (RKKP), National Clinical Registries & Department of Clinical Medicine, Copenhagen, DenmarkCorrespondence: Theo Walther Jensen, Emergency Medical Services, Region Zealand and University of Copenhagen, Ringstedgade 61, 13. etage, Naestved, 4700, Denmark, Tel +45 51 21 10 06, Email theje@regionsjaelland.dkIntroduction: Annually, approximately 4% of the entire adult population of Denmark participate in certified basic life support (BLS) courses. It is still unknown whether increases in BLS course participation in a geographical area increase bystander cardiopulmonary resuscitation (CPR) or survival from out-of-hospital cardiac arrest (OHCA). The aim of the study was to examine the geographical association between BLS course participation, bystander CPR, and 30-day survival from OHCA.Methods: This nationwide register-based cohort study includes all OHCAs from the Danish Cardiac Arrest Register. Data concerning BLS course participation were supplied b